During analysis of a returned generator, it was identified that the device experienced fluctuations in the voltage output during system diagnostic tests.An atypical output waveform occurred when the generator was programmed off, sensing was enabled and a system diagnostic test was performed.The generator can was opened and the printed circuit board assembly failed multiple electrical tests.The supply current drain with sensing enabled was outside of specification, but met specifications when sensing was off.The a2 asic was replaced and the generator then passed all functional specifications.The malfunctioning a2 asic was sent to the vendor for analysis.The asic was returned and the vendor verified the output variation through internal testing.The vendor inspected the units under a microscope and via x-ray imaging and found no visual anomalies.None of the tests performed identified the cause of the amplitude fluctuations.
|